Name :…………………………………………………… I/C :…………………………….

PENGGAL 1 960/1 STPM 2016

JABATAN PENDIDIKAN NEGERI KELANTAN

SIJIL TINGGI PERSEKOLAHAN MALAYSIA

PHYSICS 1 (FIZIK 1)

MODUL 1 One and a half hours ( Satu jam setengah)

Instructions to candidates:

DO NOT OPEN THIS QUESTIONS PAPER UNTIL YOU

ARE TOLD TO DO SO.

There are fifteen questions in Section A. For each questions, four

choices of answers are given. Choose one correct answer and

indicate it on the Multiple-choice Answer Sheet provided. Read the

instructions on the Multiple-choice Answer Sheet very carefully.

Answer all questions. Marks will not be deducted for wrong answers.

Answer all questions in Section B. Write your answers in the

spaces provided.

Answer any two questions in Section C. All essential working

should be shown. For numerical answers, unit should be quoted

wherever appropriate. Begin each answer on a fresh sheet of paper

and arrange your answers in numerical order.

Tear off the front page of this question paper in your answer

sheets of Section B, and tie both of them together with your answer

sheets in Section C.

Values of constant are provided.

Answers may be written in either English or Bahasa Malaysia

For examiner’s use

(Untuk kegunaan

pemeriksa)

Section A

(Bahagian A)

Section B

(Bahagian B)

16

17

Section C

(Bahagian C)

Total

(Jumlah)

This question paper consists of 12 printed pages and 0 blank pages.

(Kertas soalan ini terdiri daripada 12 halaman bercetak dan 0 halaman kosong.)

Values of constants

(Nilai Pemalar)

Acceleration of free fall

Avogadro constant

Boltzmann constant

Gravitational constant

Magnitude of electronic

charge

Mass of the Earth

Mass of the Sun

Molar gas constant

Permeability of free space

Permittivity of free space

Planck’s constant

Radius of the Earth

Radius of the Sun Rest mass

of electron

Rest mass of proton

Speed of light in free space

Stefan-Boltzmann constant

Unified atomic mass unit

(Pecutan jatuh bebas)

(Pemalar Avogadro)

(Pemalar Boltzmann)

(Pemalar graviti)

(Magnitud cas elektron)

(Jisim Bumi)

(Jisim Matahari)

(Pemalar gas molar)

(Ketelapan ruang bebas)

(Ketelusan ruang bebas)

(Pemalar Planck)

(Jejari Bumi)

(Jejari Matahari)

(Jisim rehat elektron)

(Jisim rehat proton)

(Laju cahaya dalam ruang bebas)

(Pemalar Stefan-Boltzmann)

(Unit jisim atom bersatu)

g = 9.81 m s-2

NA = 6.02 x 1023

mol-1

k, kB = 1.38 x 10-23

J K-1

G = 6.67 x 10-11

N m2 kg

-2

e = 1.60 x 10-19

C

ME = 5.97 x 1024

kg

MS = 1.99 x 1030

kg

R = 8.31 J K-1

mol-1

0 = 4 x 10-7

H m-1

0 = 8.85 x 10-12

F m-1

=

h = 6.63 x 10-34

J s

RE = 6.38 x 106 m

RS = 6.96 x 108 m

me = 9.11 x 10-31

kg

mp = 1.67 x 10-27

kg

c = 3.00 x 108 m s

-1

= 5.67 x 10-8

W m-2

K-4

u = 1.66 x 10-27

kg

Section A

Answer all questions in Section A

1. Which of the following is an example of random error?

A Zero error of an ammeter

B Error in the calibration of a thermometer

C Error in assuming g, acceleration of free fall is 10 m s-2

D Error in recording the time shown on a stop-watch.

2. An object is projected upwards a few times with the same velocity but with different

angles of projection. Which of the following best represents the relationship between the

range, R. and the angle of projection, ?

3. A 5 g object falls with a uniform velocity of 2.0 m s-1

. Assuming that the acceleration

due to gravity is 10 m s-2

, what is the resultant force acting on the object?

A 600 N upwards

B 800 N downwards

C 1200 N downwards

D zero

4. An aircraft has a weight of 2.94 x 106 N. At a certain instant during landing, its speed is

97.2 km h-1

. If a total frictional force is 4.50 x 105

N, what distance does the aircraft

travel before it comes to a stop?

A 176 m C 2380 m

B 243 m D 3150 m

5. The figure shows a mass m at the end of string moving in a horizontal circle of radius r

with a speed v. The string is inclined at an angle to the vertical. The tension in the

string is T.

Which of the following is the centripetal force?

A T sin C T sin +

B T cos D T sin -

6. The mass of a planet is 5.0 x 1024

kg and its radius is 6.1 x 106 m. The energy required

for a body of mass 2.0 kg to escape completely from the planet is

A 1.8 x 105 J C 1.1 x 10

8 J

B 5.5 x 107 J D 2.2 x 10

8 J

Answer: C

7. A mass m at the end of an inelastic string moves in a vertical circle with uniform angular

velocity ω.

Which graph represents the variation with angle of the tension T in the string?

8. The figure shows a uniform rod of weight W being pulled by a force T on a rough

horizontal surface.

If the block is not tilted up, with N the normal reaction of the horizontal surface on the

block, and F the friction between the block and the surface, which of the following

figures shows the correct lines of action of the forces?

A

B

T

T

N

W

F

T

N

W

F

C

D

9. When a metal wire is stretched over a limit, it undergoes plastic deformation. Which

statement is true of plastic deformation?

A Stress is proportional to strain.

B The metal is not a crystalline solid.

C The atomic planes slide over each other.

D The atoms are displaced a little from their equilibrium positions.

10. If Vav, Vmp and Vrms are the average speed, the most probable speed and the root-mean-

square speed respectively of a fixed mass of ideal gas, which of the following describes

the three speeds correctly?

A Vav < Vmp < Vrms C Vmp < Vav < Vrms

B Vrms < Vmp < Vav D Vav < Vrms < Vmp

11. Fluorine has three degrees of freedom at 50 K and five degrees of freedom at 400 K.

Which of the following can be deduced from this?

A Fluorine is a liquid at 50 K.

B Rotational and vibrational motions for fluorine are negligible at 50 K.

C At 50 K, fluorine is monatomic gas.

D Translational motion becomes negligible at 400 K.

12. When the average kinetic energy of the molecules of an ideal gas in a closed, rigid

container is increased by a factor 4, what happens to the pressure of the gas?

A It remains unchanged.

B It increases by a factor of 2.

C It increases by a factor of 4.

D It increases by a factor of 8.

T

N

W

F

T

N

W

F

13. A sample of ideal gas is in a thermally insulated container. After expansion, the temperature of

the gas

A decreases became work done by the gas reduces kinetic energy of the molecules

B increases because the molecules are moving faster

C decreases because the frequency of collisions between the molecules increases

D increases because the molecules bombard the wall of the container with more energy

14. Which statement is true of an adiabatic process?

A Boyle's law is obeyed.

B The temperature is always constant.

C The internal energy always increases.

D No heat is transferred in or out of the system.

15. Which statement about convection is correct ?

A Diffusion is a form of convection.

B Convection occurs in solids.

C Convection is due to a change in density.

D Heat travelling from the Sun to the Earth is an example of convection.

Section B

Answer all questions in Section B

16. (a) State work-energy theorem. (1m)

(b) A block of 30 kg slides down a rough inclined plane with an acceleration of 1.5 m s-2

.

The plane makes an angle of 28° with the horizontal and is 8.0 m long as shown in

diagram below.

Find

(i) the kinetic energy of the block when it reaches the bottom of the incline. (1m)

(ii) the work done to overcome friction. (2m)

(iii) the frictional force that acts on the block. (2m)

(iv) the coefficient of kinetic friction between the block and the plane. (2m)

17. (a) Define the term internal energy of a gas system. (1m)

(b) State two factors that affect the internal energy of a gas system. (2m)

(c) Find the internal energy of an ideal gas of volume 2.5 x 10-3

m3 if its pressure is

1.5 x 105 Pa. (2m)

(d) Determine the change in the internal energy of the gas if it expands at constant

pressure to a volume 3.5 x 10 -3

m3. (2m)

Section C

Answer any two questions in Section C.

18. (a) State Newton's three laws of motion. (1m)

(b) A boy ot mass 30 kg is standing in a stationary lift of mass 1 600 kg as shown in

figure below.

The lift then starts to move upwards with an acceleration of 4.00 m s 2. Three seconds

after the lift has started moving from rest.

[ Assuming that g = 9.81 m s-2

]

Calculate,

(i) the velocity of the lift, (2m)

(ii) the kinetic energy of the lift and the boy, (2m)

(iii) the distance travelled by the lift, (2m)

(iv) the change in potential energy of the lift and the boy, (2m)

(v) the tension in the cable, (2m)

(vi) the instantaneous power delivered by the motor of the lift. (2m)

(c) At the instant when the lift is ascending with a velocity of 15.0 m s-1

, the cable snaps.

Calculate the total distance travelled by the lift just before it hits the ground with a

velocity of 50.0 m s-1

. (2m)

19. (a) Explain what is meant by stress and strain?

[2 marks]

(b) Draw a graph to show how the strain in the steel wire depends on the stress.

[2 mark]

(c) A mass of 2.0 kg is hangs from the lower end of the elastic thread and produces an

extension of 20.0 mm when in equilibrium. Assuming that the elastic thread obeys

Hooke’s law, find

(i) the change in the potential energy of the mass due to the extension produced

[2 marks]

(ii) the energy stored in the elastic thread,

[2 marks]

(iii) Explain any difference in the answer to (c) and (d)

[2 marks]

(d) When the elastic thread is stretched by a larger force, Hooke’s law is no longer

obeyed. The graph of force, F against the extension x is a s shown. The arrows

indicate the order of the readings taken during loading and unloading.

By making references to the structure of rubber, describe the main features of this

graph.

[5 marks]

20. (a) One mole of a diatomic ideal gas is heated at a constant pressure of

1.01 × 105 Nm

–2 from 15.0 °C to 35.0 °C. Calculate

(i) the heat absorbed by the gas, [3 marks]

(ii) the change in the volume of the gas, [2 marks]

(iii) the work done by the gas, [2 marks]

(iv) the change in the internal energy of the gas. [2 marks]

(b) A diatomic ideal gas in a container has a pressure of 1.01 × 105 N m

–2 at 20.0°C.

The gas undergoes adiabatic compression until its volume becomes a quarter of

Its original volume.

(i) What is meant by an adiabatic compression? [1 mark]

(ii) Determine the final temperature of the gas. [3 marks]

(iii) Calculate the work done on the gas. [2 marks]